{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE TypeApplications #-}

-- |
-- Module      : Network.Reddit.Message
-- Copyright   : (c) 2021 Rory Tyler Hayford
-- License     : BSD-3-Clause
-- Maintainer  : rory.hayford@protonmail.com
-- Stability   : experimental
-- Portability : GHC
--
-- Actions for messaging. These can be both comment replies as well as private
-- messages
--
module Network.Reddit.Message
    (  -- * Actions
      getInbox
    , getUnread
    , getSent
    , markRead
    , sendMessage
    , replyToMessage
    , reportMessage
      -- * Types
    , module M
    ) where

import           Data.Generics.Wrapped        ( wrappedTo )
import           Data.Text                    ( Text )

import           Lens.Micro

import           Network.Reddit.Internal
import           Network.Reddit.Types
import           Network.Reddit.Types.Item
import           Network.Reddit.Types.Message
import           Network.Reddit.Types.Message as M
                 ( Message(Message)
                 , MessageID
                 , MessageOpts(MessageOpts)
                 , NewMessage(NewMessage)
                 , PrivateMessageID(PrivateMessageID)
                 )
import           Network.Reddit.Utils

import           Web.FormUrlEncoded           ( ToForm(toForm) )
import           Web.HttpApiData              ( ToHttpApiData(toQueryParam) )

-- | Get the 'Message' inbox for the currently authenticated user
getInbox :: MonadReddit m
         => Paginator MessageID Message
         -> m (Listing MessageID Message)
getInbox = msgs "inbox"

-- | Get the unread 'Message's of the currently authenticated user
getUnread :: MonadReddit m
          => Paginator MessageID Message
          -> m (Listing MessageID Message)
getUnread = msgs "unread"

-- | Get the 'Message's sent by the currently authenticated user
getSent :: MonadReddit m
        => Paginator MessageID Message
        -> m (Listing MessageID Message)
getSent = msgs "sent"

-- | Mark a 'Message' as read
markRead :: MonadReddit m => MessageID -> m ()
markRead mid =
    runAction_ defaultAPIAction
               { pathSegments = [ "api", "read_message" ]
               , method       = POST
               , requestData  = mkTextFormData [ ("id", fullname mid) ]
               }

-- | Send a 'NewMessage'  to another user
sendMessage :: MonadReddit m => NewMessage -> m ()
sendMessage newMsg =
    runAction_ defaultAPIAction
               { pathSegments = [ "api", "compose" ]
               , method       = POST
               , requestData  = WithForm $ toForm newMsg
               }

-- | Reply to a 'Message', returning the newly created 'Message'
replyToMessage :: MonadReddit m => MessageID -> Body -> m Message
replyToMessage mid txt = runAction @PostedMessage r <&> wrappedTo
  where
    r = defaultAPIAction
        { pathSegments = [ "api", "comment" ]
        , method       = POST
        , requestData  = WithForm
              $ toForm @[(Text, Text)]
                       [ ("thing_id", fullname mid)
                       , ("text", txt)
                       , ("api_type", "json")
                       ]
        }

msgs :: MonadReddit m
     => Text
     -> Paginator MessageID Message
     -> m (Listing MessageID Message)
msgs path paginator = runAction defaultAPIAction
                                { pathSegments = [ "message", path ]
                                , requestData  = paginatorToFormData paginator
                                }

-- | Report a message, bringing it to the attention of the Reddit admins
reportMessage :: MonadReddit m => Report -> MessageID -> m ()
reportMessage r mid =
    runAction_ defaultAPIAction
               { pathSegments = [ "api", "report" ]
               , method       = POST
               , requestData  = mkTextFormData [ ("id", toQueryParam mid)
                                               , ("reason", toQueryParam r)
                                               ]
               }